Floor jack



R. BROOK FLodR JACK March 29, 1932.

Filed March 12. 1930 2 Sheets-Sheet INVENTOR ATTORNEY March 29, 1932gf RBROOK 1,851,489

FLOOR JACK Filed March 12, 1930 2 Sheets-Shee 2 57' 0 0 INVENTOR ATTORNEY Patented Mar. 29, 1932' ,nne nntn isnoemo'r vmcouvnmmnicrlsnzCOLUMBIA, CANADA f 1 1 4 01;v JACK {sani ati nfiledmaiih 12, 930.Seria1No.435,18 2. I g

i This invention relatesto a jackfor pressingboards' or the likeintoplace, the device beingmainly designed' for "use with: floor boards;ceiling hoards, ete.; thfe=general object 5 of the invention being to'providefapairfof telescopic cylinders, one cylinder' having points atits outer end adapted to bedriven into a supporting member and theotherxhaving a shoe for engaging the nienihertoihe pressedinto place,with a manually operated cam for causinga spring to=press the shoecarrying cylinder forwardly toexert pres .sure on the board. 5 1 7Another object ofthe invention is: to "so constructand arrange the partsthat when the cam is moved to projecting position it willjlocl; theparts in-this'p0sitioi1. v This invention also consists in'cer'tainother "features of constructionandin the combinationand {arrangement ofthe "several parts, tobe hereinafter fully described, illustrated intheecconipanying drawings and specifically pointed out in"- the appendedIn describing theinvefition'in detail; reference' will be had to theaccompanying d r'awingswherein like characters-denote like orcorresponding part's'throughout the several views, and in which 1 gFigure-1 is a sectional view'showing the device in use and before thecam is moved to projecting position.

Figure 2 is a similar View, but showing the cam in position locking theshoe carrying cylinder in projecting position.

Figure 3 is a top plan view of Figure 2.

I Figure 4: is a section on line 4. lof Figure 2.

fragmentary view similar to 7 is a section on line 77 of Fig- Figure 5is an end View showing the points ena's-fepen and their outer endsclosed and the 'pylinder 1 is formed with thepointsjor pr0 ect1ons 3 atits o-uterrend whieli are ad'apt-v edtobe driven into a joistor othersupporting memb r -A.&The t0 of this cylindeif outer end, is formed withaflthickened" p 4 am so that it can be struck byiahamnierfiorthe like tocause the so formed that .it Inlay he used with i boards. V

j' t edges as j l, a age a n having stra' tongues; pp a by An openingsis-formed at the center of the shoe, said. opening extendingthr'oughthe front edge of the shoe and, this vopening per. niits theboard tohe minder otherwise fast} ened place while'it'is being pressed.the "shoe. J The shoe is] of} elongated form; as shown seas to engage. a'considerable part of the boardfand smashes cents formedjwiththickenedportions, if desired; so that it can fbestru'ck by a hammer orthe'like, f ,cup-shaped piston Sfis arranged inthe inner cylinder2 and aspring" 9is, located in the cylinder and he'ars against the front innerI endthei e i and against thepistofi; V l "iA sha 1310 has itsendsfitting i fh'oles .in tlie 01:1ter cylinder and saidfs'haft; passes 7through elongated slotsflll in the inner cylinder; the shaft carrying a:c-am 12which' is '85 formed with a curved handle13which passes throughsIOt sQl Lifor-inedin the ppei partsof thecylinders-ff V p H y When thehandle isin raised position, a fiat fedgefof 'thecam willenfgag'e thepiston, as

'ishdwninFi ui e 1, but when the hai'idle is] a swung downwardlyand'rearwardly, the nose ofi'thecani will engage the. piston and thisforce the same forwardlyso asto contract the spring and causcisaidspring tdprojectfthe cylinder 2 cause the shoe to exert pressure againstthe board which'it'engages. ,The partsare" so arranged and constructedthat when the handle is de 'ji-"essed, theic'am will loek thepartsinprojected position; as shown atits 55 points to penetrate t esupmed theouter end ofthefco in'Figure 2, so thatit is not necessary tohold V thehandle indepressed position and thus both v or it may be used onceilingboards, as shown in Figure 8, and,.of course, it can beused on sideboards, When used on ceiling boards, a-

tubular member can be slipped overthe handleso as to provide-greaterleverage for operating the cam. When used on floor boards, the foot.

a simpledevice for pressing one board against another and for lioldingthnb r position while it is being n d I a, I

Itis ;thoughtfrom the foregoing 7 tion' that theadvantages and novelfeatures'of the invention willbe readily apparent. I I I wItis to beunderstood that changes maybe made in the construction and in thecombination-and arrangement of the several par ts,

' provided thatsuch 'changesfall within'the scope of theappended claims.

end of onecylinder, pointed proj ections atjthe outer end of the othercylinder, spring means in the inner cylinder, a transverse shaft piv- II otallyand slidably connected tothe cylinders,

a on the shaftand having a vpair of active faces, 'anda handle connected.witlrthe cam and passing through slots-in the cylinders wherebybymoving the handleinv a certain direction, oneof ithe facesof vthe-Teamwines handle may be depressed by the" engaginga strip of flooring, acamhaving angularly disposed faces carried by said cyl'-' inders,tensionmeans between the inner cylinder and the cam, and a handle foradjust- 'sion means, whereby the positioning of the ing the position ofthe cam to alternately engage the faces of the cam with said tenhandleinone, position will bring one of the faces into engagement with thetension means for holding theinner cylinder pro- .jeotedlrelative' tothe outer cylinder.

i. A floor jack comprising inner and outer cylinders, anchoring meansfor the outer cylv a. I .7 inder,.a shoe on the inner cylinder toengage- Thusit will be seen that I have provided a strip of flooring, acam pivotally and slidably connected to the cylinders andhavingangularly disposed faces, tension means beto alternately engage thefaceslof the cam j-with said tension means whereby the posibringione ofthe fa cesintoengagement with the tension means for holding .theinnercyltioning of :the handle in one position will inder projected relativeto the'outergcylindenfl v 5. v A floor jack comprising inner and outer 7cylinder, a shoe on the inner cylinder to en -gage astrip of flooring, acampivotally and ingangularlydisposed-faces, a follower slid- .jcylinders, an anchoring means :on the outer slidably. connectedltothecylinders and hart-i 5 able in the inner cylinder to be engaged bythe cam, tension means between the inner cylinder vand'the follower, andthe handle handle in one position will bring one of the gag ancr exert!pressure upon the spring ing out through saidouter edge, downwardlyextending pointed projections at theouter inder having longitudinallyextending slots thereinand both cylinders having longitua shaft passingtransversely through the cylinderswith itsends oarriedby the outer 1cylinder and said shaft passing through the holding the inner cylinderto the outer cylinder. I V a. 7 v 1 In testimony whereof I afiixmysignaturer ,ner' cylinder, said Tshoehaving agroove in its outeredgeand open ng at ts center openendof ,the outer cylinder, said innercyldillally extending slots i n their upper parts,

k first mentioned slots in they inner cylinder,ia.

cam on the shaft, ahandle,connectedfwith A I ,the cam and passingthrough the upper a I slots in the cylinders, a'piston in the inner I vcylinder engaged by the, cam and a. spring 3. A floor jack'comprisinginner and outer cylinders-a shoe on the other cylinder-and in the'inn ercylinder'bearing against the piston andthe frontend of the innercylinder.

faces into engagement with the follower for .1; E IN L -BROO Icylinders, anchoring; means for ,one of the i p rejected {relative i foradjusting thepositionof the cam to alter- 1 .nately engage the faces ofsaid cam-Withthe follower', and whereby the positioning of the i

